I was tasked with updating our Special Receptacle family to entirely Instance based parameters. I wanted to share what I learned and I wanted to thank @ToanDN for his previous solution that helped me along the way.
I started by incorporating a Lookup Table to find the NEMA Code information from the Voltage, Phase, and Amp-Rating (this can also be done in reverse).
size_lookup(LT, "NEMA_Code", "NONE", _Voltage_Nominal, Power Phase, _GROUNDED, _NEUTRAL, _TWIST_LOCK, AMP RATING)
Then I needed some nested NAnd statements to specify the Voltage range to match the project Voltage Definitions.
if(and(not(Voltage Nominal < 110 V), not(Voltage Nominal > 130 V)), 120 V, .....
Lastly, I needed to have a comparison for the Apparent Power Calculated from the FLA and the Amp-Rating of the receptacle to find the lower of the two values unless the FLA was set to 0 amps.
Cheers and thanks to this community for a source of help along the way.
